W9DMK (Robert Lay) wrote:
On Mon, 21 Feb 2005 03:55:43 -0800, Roy Lewallen
wrote:


It's not clear to me how you correlate how warm something gets in the
microwave oven with how much loss it'll incur at the end of an HF
antenna. Maybe someone can explain this.



Dear Roy,
Perhaps that is not the objective, Roy - maybe the rationale' is
simply to decide whether or not a particular sample of material is a
"high loss" dielectric or not.

Is a material that is "high loss" at microwave frequencies always "high
loss" at HF? How "high" does the loss have to be in order to detract
from an HF antenna's performance when used as an end insulator? When you
put an object in the microwave oven for a minute with a glass of water
and the temperature rises 10 degrees C, how "high" is the loss? How
"high" is the loss at HF?

Roy Lewallen, W7EL